"Our negotiations with management were successful," port union leader Cristian Salfate said by telephone.
Workers started their strike over pay and work conditions at Antofagasta, which serves Chile's northern mining region, late on Tuesday, leaving at least one copper shipment delayed for global miner Xstrata Copper (XTA.L: Quote, Profile, Research, Stock Buzz).
The port receives copper for shipment from mines producing about a third of the world's copper.